Not
I want to tell you about electronic digital logic gates. They are measured as 0 (low) and 1 (high). There are many types like AND, OR, NOT, XOR, etc.
Today I want to tell you about NOT gate. It is an inverter or a digital logic gate that controls logical negation. It works according to the truth table below. A HIGH output (1) results if the inputs is LOW (0). If the input is HIGH (1), a LOW output (0) results.
INPUT OUTPUT
A X
0 1
1 0
The NOR could gate can be used in the same configuration. Any logic gate can be made from a combination of NAND gates or NOR gates.
Symbols

Reference:www.technology.niagarac.on.ca